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LEVEL 1Q1. Ifã 3i+ 5)-7k and b 71+3k, find a.b and interpret the results.Q2. Find m if à is perpendicular to b, where a mi + 4) -k and b -31 + mj -2kQ3. Find the angle between the vectors a and b ifa 1-2) + k and b 21-2) + 2k.Q4. Find the length of projection of ialong -jQ5. Find the angle between the two vectors given by a- pi +gi+ rk and b xi yj + zk06. Find the length of projection ofa on b, where a = 1-1+ k and b = 1 +)-2k

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